St. John's High, Charleston: zone, report card and calendar

Last checked Oct. 16, 2026. Sources: the school’s website; the school’s administration page; Charleston County School District’s school lookup tool, 2026-27 academic calendar and 2026-27 bell schedule; the S.C. Department of Education’s 2024-25 report card data files; the federal NCES school directory; the South Carolina High School League’s 2026-28 reclassification.

St. John’s High is the Charleston County School District high school for Johns Island, on Main Road. It has a Johns Island mailing address, and it sits inside Charleston city limits on the Census Bureau’s boundary map. It was rated Average, with 59 points, on South Carolina’s 2024-25 report card.

Who to call

• Front office: 843-559-6200, 1518 Main Road
• School website: stjohns.ccsdschools.com
• Enrolling a new student: register at the zoned school; the district lists what to bring on its required documents page. District office: 843-937-6300
• Which school is my address zoned for? the district’s school lookup tool
• Buses: the district’s transportation page, with its 2026-27 bus stop locator

Principal

Principal Sean Bishton, according to the school’s administration page. The page also lists Vanessa Denney as school leader and executive associate, working with him on the transition.

Enrollment and teachers

• State count: 390 students in the 2024-25 school year, according to the state’s report card data.
• Federal count: 423 students in the 2023-24 school year, with 30 full-time-equivalent teachers, according to the NCES directory. That is about 14 students per teacher.

State report card

South Carolina rates every public school each year as Excellent, Good, Average, Below Average or Unsatisfactory. An Excellent rating means “school performance substantially exceeds the criteria to ensure all students meet the Profile of the SC Graduate,” according to the state’s report card site. The overall rating is built from indicators such as academic achievement, preparing for success, student progress, English learners’ progress and school climate, with graduation rate and college and career readiness added for high schools.

2024-25 rating: Average, 59 points. On the state’s high school scale, Excellent 67 to 100, Good 60 to 66, Average 51 to 59, Below Average 40 to 50 and Unsatisfactory 39 and below.

• Four-year graduation rate: 92.5% in 2025, after 83.3% in 2024 and 81.7% in 2023 (district: 90.6% in 2025)
• College or career ready: 96.2% of the 2025 graduating class (district: 84.8%)
• End-of-course tests, share scoring A, B or C: English 57.3%, Algebra 35.1%, Biology 21.8% and U.S. History 14.4%
• AP and dual enrollment: 1.9% of the 2025 graduating class met the state’s college-ready mark through AP exams and 32.1% through dual-enrollment courses

The full report card, with test results by group, teacher data, school safety and spending, is on the state’s SC School Report Cards site. The state publishes new ratings each fall.

Attendance zone

Check an address with the district’s school lookup tool, which the district links from its lookup page.

The St. John’s High zone covers Johns Island, including the parts inside the city, and Wadmalaw Island. In the district’s zone layers it takes in the whole Haut Gap Middle zone, which is fed by Angel Oak Primary for 4K to first grade and Johns Island Elementary for second to fifth grade; Frierson Montessori on Wadmalaw is a choice option for part of the area.

We did not find a published feeder list on the district’s site, so these pairings come from the district’s own zone layers, for 2025-26 and 2026-27; where a zone is split, the street address decides.

Calendar and school hours

St. John’s High follows Charleston County School District’s 2026-27 calendar. Coming dates from the academic calendar (PDF):

• Tuesday, Nov. 3: Election Day, schools closed
• Nov. 23-24: no school; both are weather make-up days if the district needs them
• Nov. 25-27: fall break
• Friday, Dec. 18: half day
• Dec. 21 to Jan. 1: winter break; students return Tuesday, Jan. 5

School hours: 8:45 a.m. to 3:45 p.m., with arrival from 8:20 a.m., according to the district’s 2026-27 bell schedule (PDF). Early-release days end at 1:45 p.m. and half days at noon.

Sports and activities

St. John’s is a Class 1A school in Region 8 for the South Carolina High School League’s 2026-28 classification, with Baptist Hill, Burke, Charleston Charter, Cross, Lowcountry Leadership, Military Magnet and Palmetto Scholars, according to the SCHSL reclassification lookup.

The school’s athletics website, islanderathletics.com, is linked from its home page.

Fall schedules and results are in our Friday night football guide and on our scoreboard.

More

• The district’s high schools page
• Every public school in Charleston, with zones and report cards
• Our Charleston schools guide for the district calendars, enrollment and the school board

Frequently asked questions

What grades does St. John’s High serve?

St. John’s High serves ninth through 12th grade, according to the state’s 2024-25 report card.

What is St. John’s High’s school rating?

St. John’s High was rated Average, with 59 points, on South Carolina’s 2024-25 school report card, the latest the state has published.

Which middle school feeds St. John’s High?

In Charleston County School District’s zone layers, the St. John’s High zone takes in the whole Haut Gap Middle zone, fed by Angel Oak Primary and Johns Island Elementary.

What time does St. John’s High start?

The school day runs 8:45 a.m. to 3:45 p.m., with arrival from 8:20 a.m., according to the district’s 2026-27 bell schedule.